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Dry Natural Gas Proved Reserves
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2005 2006 2007 2008 2009 2010 View
History
Proved Reserves as of Dec. 31
4,314 3,931 3,982 3,557 3,279 3,673 1977-2010
Adjustments
88 89 79 -6 224 140 1977-2010
Revision Increases
207 807 407 334 212 687 1977-2010
Revision Decreases
381 1,020 221 498 403 166 1977-2010
Sales
44 18 65 17 2 17 2000-2010
Acquisitions
60 13 63 30 1 23 2000-2010
Extensions
108 93 149 78 24 27 1977-2010
New Field Discoveries
0 0 0 9 0 4 1977-2010
New Reservoir Discoveries in Old Fields
4 3 0 2 0 1 1977-2010
Estimated Production
380 350 361 357 334 305 1977-2010
- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Notes: Miscellaneous States includes Arizona, Illinois, Indiana, Maryland, Missouri, Nebraska, Nevada, Oregon, South Dakota, and Tennessee.  See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 8/2/2012
Next Release Date: 8/30/2013